" A study in Neurobiology of Learning and Memory addressed this, and researchers found that people completed a task 20% faster after intense exercise versus calmer exercise. The bigger the physical toll, the more hormones and neurotransmitters are released to your memory’s benefit. Just imagine how alert and aware you suddenly are if you are driving and almost get into an accident. That’s the same sort of brain rush. "

― Peter Hollins , Learn Like Einstein: Memorize More, Read Faster, Focus Better, and Master Anything With Ease… Become An Expert in Record Time (Accelerated Learning)